1.spring-serlvet.xml
1 <!-- 文件上传 --> 2 <bean class="org.springframework.web.multipart.commons.CommonsMultipartResolver" id="multipartResolver"> 3 <!-- 编码方式 --> 4 <property name="defaultEncoding" value="utf-8"></property> 5 <!-- 文件最大 --> 6 <property name="maxUploadSize" value="10485760000"></property> 7 <!-- 缓存--> 8 <property name="maxInMemorySize" value="40960"></property> 9 </bean>
注：这里bean的Id一定要写multipartResolver,前面不能加commons。
2.Controller（一共有两种方法）
1 @RequestMapping("/load") 2 public String downLoad( 3 @RequestParam("wenjian")CommonsMultipartFile multiFile, 4 HttpServletRequest request) { 5 if (!multiFile.isEmpty()) { 6 File test = new File("D://upload"); 7 if(!test.exists()){ 8 test.mkdirs(); 9 } 10 try { 11 FileOutputStream out = new FileOutputStream("D://upload//" 12 + multiFile.getOriginalFilename()); 13 InputStream in = multiFile.getInputStream(); 14 int len; 15 byte[] buffer = new byte[1024 * 1024 * 10]; 16 while ((len = in.read(buffer)) > 0) { 17 out.write(buffer, 0, len); 18 out.flush(); 19 } 20 out.close(); 21 in.close(); 22 } catch (Exception e) { 23 throw new RuntimeException(e); 24 } 25 } 26 return "/success"; 27 } 28 29 @RequestMapping("load1") 30 public String upload(HttpServletRequest request,HttpServletResponse response){ 31 CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext()); 32 33 if (multipartResolver.isMultipart(request)) { 34 MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request; 35 36 Iterator<String> iter = multipartHttpServletRequest.getFileNames(); 37 38 while(iter.hasNext()){ 39 MultipartFile file = multipartHttpServletRequest.getFile(iter.next()); 40 System.out.println(file.getOriginalFilename()+"*-------------------"); 41 if(file != null){ 42 File test = new File("D://upload"); 43 if(!test.exists()){ 44 test.mkdirs(); 45 } 46 File filePath = new File("D://upload/"+file.getOriginalFilename()); 47 try { 48 file.transferTo(filePath); 49 } catch (Exception e) { 50 throw new RuntimeException(e); 51 } 52 } 53 } 54 55 } 56 57 return "/success"; 58 }
3.jsp
1 <form name="up" action="<%=request.getContextPath() %>/file/load" method="post" 2 enctype="multipart/form-data"> 3 <input type="file" name="wenjian" /> 4 <input type="submit" value="上传" /> 5 </form>
在做springmvc上传时需要两个jar文件
1.com.springsource.org.apache.commons.fileupload-1.2.0.jar
2.com.springsource.org.apache.commons.io-1.4.0.jar
这两个jar文件有的时候名字会变commons.fileupload-1.2.0.jar ，commons.io-1.4.0.jar ,其实都一样
如果没有这两个jar包回报错:java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory
如果没有multipart解析器回报这个错：org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.ClassCastException: org.apache.catalina.connector.RequestFacade